Lapping machine



C :ami I LX L July 16, 1940. M, C;- FlEDLER 2,208,499

LAFPING MACHINE Filed Oct, lO, 1939 3 Sheets-Sheet l M. s. FIEDLER 2,208,499

LAPPING MACHINE Filed Oct. l0, 1939 3 Sheets-Sheet 2 Examine! Jlb' 15, l940 M. G. FIEDLER 2,208,499

LAPPING MACHINE Filed Oct. 10, 1939 5 Sheets-Sheet 3 Examlne Patented July 16, 1940 LAPPING MACHINE Max George Fiedler, Media, Pa., assignor to Fiedler-Sellers Corporation, Philadelphia, Pa., a corporation of Pennsylvania Application October 10, 1939, Serial No. 298,858

12 Claims. (Cl. 51-53) Heretofore, the usual practice in lapping decable unit I8 is mounted, this unit includingalow- 5 vices of this character has been to produce a pluer disc element I9 and spaced upper disc elements rality of lapping elements graded in size from the 20 and 2| between which upper disc elements a smallest to the ultimate size, replacing each size as gear 22 keyed to shaft I2 is mounted for a purpose the lap becomes suciently worn. This procedure, presently to appear. The discs 9, 20 and 2| obviously, incurs considerable cost in production mount spindles 23, these spindles being rotatably 10 of the lapping elements and involves considerable secured in the uppermost disc element 20 as at time in retting the lapping machines, particu- 24, and rotatably directed through the disc elelarly Where, as in the case of the injection valve ments 2| and I9. Each spindle has secured holders of Diesel engine injection apparatus, the thereto a pinion 25 meshing with gear 22 so that 15 tolerances are extremely low. upon rotation of shaft I2 the spindles are rotated An important object of this invention is the at high speeds. The lower end of each spindle provision of a lapping apparatus so constructed carries a lapping element 26 for engagement with that it is merely necessary to produce a single size the elements to be lapped and the lower disc I9 of lapping element and in which it is unnecessary has at its lower surface a guide 2'I for each spindle to change more than a single lapping element at 23, each guide having associated therewith a 20 each renewal of the machine. spring-pressed holder 28 to engage the member Further objects of the invention are the proto be lapped and hold the same in position in its duction of a device of this character which may socket during the lapping operation. The recipbe readily and cheaply manufactured, which will rocable unit I8 is, as in the case of table I3,

be durable and eicient in service and a general mounted for rotatable adjustment about shaft I2 25 improvement in the art. and to permit the shaft to rotate with relation These and other objects I attain by the conthereto. It is, likewise, provided with a series struction shown in the accompanying drawings of notches 29 corresponding in number and arwherein, for the purpose of illustration, I have rangement to the spindles 23, such notches being 30 shown a preferred embodiment of my invention adapted to be selectively engaged by a spring- 30 and wherein: pressed latch 30. Means are provided, as at 3|,

Fig. 1 is a vertical sectional view through lapfor rotating shaft I2 and as at 32 for shifting the ping apparatus constructed in accordance with reciprocating unit downwardly, return movement my invention; thereof being obtained through springs 33.

Fig. 2 is a section on line 2-2 of Fig. 1; It will be obvious that with a structure of this 35 Fig. 3 is a detail sectional View showing a single character it is possible, from a single loading lapping element; station, to successively remove lapped elements Fig. 4 is a section on line 4-4 of Fig. 1; and and replace the same with units to be lapped Fig. 5 is a section on line 5 5 of Fig. 1. simply by rotating table I3 in a step-by-step Referring now more particularly to the drawmovement, or the same effect could be obtained 40 ings, the numeral II) indicates a suitable base roby rotating the reciprocating unit I8 in a similar tatably supporting through bearings II a vertical step-by-step movement. It is to be understood shaft\|2\. Surrounding this shaft and rotatable that the laps, which are at present indicated as ythereabout is a table I3 having sockets I4 for being 12 in number, will be/gradecLas to size,

the reception of the elements to be lapped, at starting with the smallest and ending with the 45 present shown as valve bodies I5 of Diesel injeclargest lap. Obviously, since laps depend upon tion nozzlesl The support of table I3 is such that friction for their eifect, the laps in service will all the table may be rotated relatively to the shaft, wear slightly. By reason of the fact that both andthat theshaft in turn may rotate within the table I3 and unit I8 may be rotated in step-bytable while the table is stationary. To this end, step relation, it becomes possible to produce a 50 the peripheryof the table is provided with a series single size of lap and maintain the machine in of notches lwhich may be selectively engaged operation after operation has once been started. bya releasable latch element II. The notches I6 When the laps become suciently worn, the correspond in`\\ nu ber and arrangement to the smallest size lap of the previous series is removed sockets I4 and each socket may, accordingly be and replaced by one of the larger size, the adjust- 55 This invention relates to lapping machines and, more particularly, to that type of lapping machine wherein the article being lapped is subjected to the action of a series of lapping elements.

aligned with a selected loading station which, for the purposes of this description, may be taken as the position indicated at A in Fig. 2.

About the shaft above the table I3 a reciproment to the loading and replacing station A being accomplished by relative rotation through one step of the table I3 and unit I8. By employing this method of operation the production may be materially speeded up and its cost, furthermore, reduced by reason of the fact that it no longer becomes necessary to produce a plurality of different sizes of laps.

Since the construction illustrated herein is one of many forms which my invention may take, I do not Wish to be understood as limiting myself thereto except as hereinafter claimed.

I claim:

1. In a lapping machine, a series of reciprocable members each bearing a lapping element, a corresponding series of holders adapted to receive articles to be lapped, means to circumferentially adjust said series of members to successively align the same with a given one of said holders, means to circumferentially adjust said series of holders, and means to reciprocate said members.

2. In a lapping machine, a series of reciprocable members each bearing a lapping element, a corresponding series of holders adapted to receive articles to be lapped, means to circumferentially adjust said series of members to successively align the same with a given one of said holders, means to rotate said members, means to circumferentially adjust said series of holders, and means to reciprocate said members.

3. In a lapping machine, a series of reciprocable members each bearing a lapping element, a corresponding series of holders adapted to receive articles to be lapped, step-by-step means to circumferentially adjust said series of members to successively align the same with a given one of said holders, step-by-step means to circumferentially adjust said series of holders, and means to reciprocate said members.

4. In a lapping machine, a series of reciprocable members each bearing a lapping element, a corresponding series of holders adapted to receive articles to be lapped, step-by-step means to circumferentially adjust said series of members to successively align the same with a given one of said holders, means to rotate said members, step-by-step means to circumferentially adjust said series of holders, and means to reciprocate said members.

5. In a lapping machine, a reciprocable unit mounting a plurality of spindles each adapted to receive a lapping element, a series of holders corresponding in number and arrangement to said spindles and adapted to receive articles to be lapped, means to circumferentially adjust said unit to successively align the spindles of the same with a given one of said holders, means to circumferentially adjust said series of holders, and means to reciprocate said unit.

6. In a lapping machine, a reciprocable unit mounting a plurality of spindles each adapted to receive a lapping element, a series of holders corresponding in number and arrangement to said spindles and adapted to receive articles to be lapped, means to circumferentially adjust said unit to successively align the spindles of the same with a given one of said holders, means to circumferentially adjust said series of holders., means to rotate said spindles, and means to reciprocate said unit.

'7. In a lapping machine, a reciprocable unit mounting a plurality of spindles each adapted to receive a lapping element, a series of holders corresponding in number and arrangement to said spindles and adapted to receive articles to be lapped, step-by-step means to circumferentially adjust said unit to successively align the spindles of the same with a given one of said holders, step-by-step means to circumferentially adjust said series of holders, and means to reciprocate said unit.

8. In a lapping machine, a reciprocable unit mounting a plurality of spindles each adapted to receive a lapping element, a series of holders corresponding in number and arrangement to said spindles and adapted to receive articles to be lapped, step-by-step means to circumferentially adjust said unit to successively align the spindles of the same with a given one of said holders, step-by-step means to circumferentially adjust said series of holders, means to rotate said spindles, and means to reciprocate said unit.

9. In a lapping machine, a standard, a table rotatable about the standard and having a circumferential series of means for receiving articles to be lapped, a unit reciprocable and rotatable upon the standard and having a circumferential series of spindles corresponding in number and arrangement to said receiving means, means to hold said table in rotatably adjusted positions in each of which a receiving means is in alignment with a spindle, means to hold said unit in rotatably adjusted positions in each of which the spindles are in alignment with the receiving means, means to rotate said spindles and means to reciprocate said unit.

10. In a lapping machine, a standard, a table rotatable about the standard and having a circumferential series of means for receiving articles to be lapped, a unit reciprocable and rotatable upon the standard and having a circumferential series of spindles corresponding in number and arrangement to said receiving means, means to hold said table in rotatably adjusted positions in each of which a receiving means is in alignment with a spindle, means to hold said unit in rotatably adjusted positions in each of which the spindles are in alignment with the receiving means, means to rotate said spindles and means to reciprocate said unit, said standard comprising a shaft rotatably directed through said table and unit, means to rotate said shaft, a gear splined to said shaft and reciprocating with said unit and pinions on said spindles engaging said gear.

11. In a lapping machine, a standard, a table rotatable about the standard and having a circumferential series of means for receiving articles to be lapped, a unit reciprocable and rotatable upon the standard and having a circumferential series of spindles corresponding in number and arrangement to said receiving means, said table having a circumferential series of latch elements corresponding in number and arrangement to the receiving elements and radially aligned therewith, a stationary latch to selectively engage the latch elements of the table, means to hold said unit in rotatably adjusted positions in each of which the spindles are in alignment with the receiving means, means to rotate said spindles and means to reciprocate said unit.

12. In a lapping machine, a standard, a table rotatable about the standard and having a circumferential series of means for receiving articles to be lapped, a unit reciprocable and rotatable upon the standard and having a circumferential series of spindles corresponding in number and arrangement to said receiving means, means to hold said table in rotatably adjusted Uli Examine:

positions in each of which a receiving means is in alignment with a spindle, said unit comprising a disc the periphery of which is provided with notches corresponding in number to and radially aligned with said spindles, a stationary latch to coact with said notches, said latch being vertically elongated to maintain engagement with said notches during reciprocation of the unit, means to rotate said spindles and means to reciprocate said unit.

MAX GEORGE FIEDLER. 

